CN206756173U - A kind of double air chamber nuclear spin gyroscopes - Google Patents
A kind of double air chamber nuclear spin gyroscopes Download PDFInfo
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- CN206756173U CN206756173U CN201720655084.1U CN201720655084U CN206756173U CN 206756173 U CN206756173 U CN 206756173U CN 201720655084 U CN201720655084 U CN 201720655084U CN 206756173 U CN206756173 U CN 206756173U
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Abstract
The utility model discloses a kind of double air chamber nuclear spin gyroscopes, including the first magnetic screen shell, first air chamber, first pumping coil, first main field coil, first laser detector, second magnetic screen shell, second air chamber, second pumping coil, second main field coil, second laser detector, laser, magnetic field generator and signal processor, the second air chamber and the first air chamber are then passed through after the second pumping coil and the first pumping coil are each passed through after laser is divided into two caused by laser, then it is transferred to signal processor after second laser detector and the detection of first laser detector.The utility model is using double air chamber schemes, the polarization FID processes of each air chamber can be controlled alternately, previous short time when so calculating gyro signal all after the FID processes of each air chamber start is carried out, FID signal intensity is higher, signal to noise ratio is improved very well, high sensitivity, continuous angular displacement signal can be obtained compared to single air chamber scheme.
Description
Technical field
It the utility model is related to a kind of nuclear gyroscope, more particularly to a kind of double air chamber nuclear spin gyroscopes.
Background technology
Gyroscope is the core sensor of inertial navigation system, and its performance will directly determine the navigation accuracy of inertial navigation system.It is high-precision
Spend the development experience liquid floated gyroscope using Newton classic mechanics as theoretical foundation, the flexure gyroscope of gyroscope, to
Lasergyro, fibre optic gyroscope based on Sagnac (Sagnac) effect, the operation principle and performance of gyroscope occur
Earth-shaking change.With the fast development of modern physicses, atom cooling, atom manipulate, the made rapid progress of laser technology,
Be born a kind of novel gyroscope i.e. atomic gyroscope using Atomic Physics and quantum mechanics as theoretical foundation again.
Atomic gyroscope is also referred to as nuclear gyroscope or atom nuclear gyroscope, and nuclear spin gyroscope be it is a kind of based on atom from
The atomic gyroscope of rotation, the precision level of present laser gyroscope can be reached, the need of tactics class precision Navigation Control can be met
Ask, have in miniaturization and low cost and have great advantage.For example the United States Patent (USP) of Patent No. " US4157495 " describes one
Atom laser gyroscope of the kind based on nuclear magnetic resonance, intert-gas atoms is produced macroscopic moment using spin-exchange polarization, applied laterally
Add a frequency to be equal to the alternating excitation magnetic field of Larmor frequency and maintain nuclear spin precession, the frequency in transversely excited magnetic field need to pass through
The feedback of phase or frequency is allowed to the Larmor precession phase consistently equal to observed or frequency；Application No.
A kind of micro-structural magnetic resonance gyroscope instrument of the Introduction To Cn Patent of " 201410850412.4 ", its operation principle is the same as the above-mentioned U.S.
Patent is identical；German P.Harle (Stuttgart University) et al. describes one kind and is based on nuclear spin and optical pumping
Angular transducer, the FID signal using the intert-gas atoms magnetic moment of single air chamber be free induction decay signal extraction angle
Spend information.
Above-mentioned traditional nuclear spin gyroscope, the first and second are required for the transversely excited magnetic field of feedback, to phase
The precision and real-time of control have high requirements, and control algolithm is complicated, requirement of real-time is high；The third is due to FID signal
Decay, signal to noise ratio drastically decline, and the bias stability of measurement sensitivity and angle strongly reduces, so continuous angle can not be realized
Degree measurement.
Utility model content
The purpose of this utility model is that to solve the above problems and provides a kind of double air chamber nuclear spin gyroscopes, its
FID signal intensity is higher, and signal to noise ratio is improved very well, high sensitivity, can obtain continuous angular displacement signal.
The utility model is achieved through the following technical solutions above-mentioned purpose：
A kind of double air chamber nuclear spin gyroscopes, including the first magnetic screen shell, the first air chamber, the first pumping coil, first
Main field coil, first laser detector, the second magnetic screen shell, the second air chamber, the second pumping coil, the second main magnetic field lines
Circle, second laser detector, laser, magnetic field generator and signal processor, first air chamber, the first pumping coil
It is placed in first main field coil in the first magnetic screen shell, magnetic field and institute caused by the first pumping coil
Magnetic direction caused by stating the first main field coil is mutually perpendicular to and can pass through first air chamber, second air chamber, institute
State the second pumping coil and second main field coil is placed in the second magnetic screen shell, the second pumping coil
Magnetic direction caused by caused magnetic field and second main field coil is mutually perpendicular to and can pass through second air chamber；Institute
It is identical with magnetic direction caused by the second pumping coil to state magnetic field caused by the first pumping coil, first main magnetic field lines
Magnetic field caused by circle is identical with magnetic direction caused by second main field coil, shape, described the first of size all same
The gentle qi of chong channel ascending adversely of intert-gas atoms in air chamber and second air chamber comprising alkali metal atom, for spin-exchange polarization
Body, the control output end of the magnetic field generator input with the first pumping coil, first main magnetic field lines respectively
The input of the input of circle, the input of the second pumping coil and second main field coil is corresponding to be connected, described
Laser caused by laser is divided into two be each passed through first air chamber and second air chamber after be radiated at described respectively
The induction end of the induction end of one laser detector and the second laser detector, the signal output of the first laser detector
Input of the signal output part of end and the second laser detector respectively with the signal processor is connected.
Specifically, the first laser detector, the second laser detector, the laser, the magnetic field occur
Device and the signal processor are placed in outside the first magnetic screen shell and the second magnetic screen shell.
Specifically, the laser can be one and be pump laser, in laser caused by the pump laser
Half laser after the half reflection reflection of pump power mirror reflection with half reflection and half transmission function is along the first pumping coil
Caused magnetic direction passes through described second through first air chamber or along magnetic direction caused by the second pumping coil
Air chamber, second half laser in laser caused by the pump laser after half reflection reflection of pump power mirror transmission is through tool
The total reflection reflection of pump power mirror for having total reflection function passes through described along magnetic direction caused by the second pumping coil after reflecting
Second air chamber passes through first air chamber, the first laser detector along magnetic direction caused by the first pumping coil
It is photodetector with the second laser detector.
As needed, the laser can also be two and respectively pump laser and detecting laser, the pump
Half in laser caused by the laser of Pu after the half reflection reflection of pump power mirror reflection with half reflection and half transmission function swashs
Magnetic direction caused by light along the first pumping coil is through first air chamber or along caused by the second pumping coil
Magnetic direction passes through second air chamber, and it is saturating to pass through the half reflection reflection of pump power mirror in laser caused by the pump laser
Second half laser after penetrating produces after the total reflection reflection of pump power mirror reflection with total reflection function along the second pumping coil
Raw magnetic direction through second air chamber or passes through first gas along magnetic direction caused by the first pumping coil
Room；In laser caused by the detecting laser after with the half reflection of half reflection and half transmission function detection speculum reflection
Half laser along simultaneously with first main field coil caused by magnetic caused by magnetic direction and the first pumping coil
The vertical direction of field direction through first air chamber or along simultaneously with second main field coil caused by magnetic direction and
The vertical direction of magnetic direction caused by the second pumping coil passes through second air chamber, caused by the detecting laser
Second half laser in laser after half reflection detection speculum transmission passes through the total reflection detection with total reflection function
Along while with caused by magnetic direction caused by second main field coil and the second pumping coil after speculum reflection
The vertical direction of magnetic direction through second air chamber or simultaneously with first main field coil caused by magnetic direction and
The vertical direction of magnetic direction caused by the first pumping coil passes through first air chamber；Caused by the detecting laser
Two parts of laser are each passed through the sense that the first laser detector is radiated at after first air chamber and second air chamber
The induction end of second laser detector described in Ying Duanhe, the first laser detector and the second laser detector are difference
Fraction polarization detector.
The beneficial effects of the utility model are：
The utility model can control the polarization-FID processes of each air chamber alternately, so using double air chamber schemes
Previous short time when calculating gyro signal all after the FID processes of each air chamber start is carried out, and FID signal intensity is higher,
Signal to noise ratio is improved very well, high sensitivity, and continuous angular displacement signal can be obtained compared to single air chamber scheme.
Brief description of the drawings
Fig. 1 is the structural representation of double air chamber nuclear spin gyroscopes described in the utility model embodiment 1；
The magnetic field that Fig. 2 is the first air chamber described in the utility model embodiment 1 and the second air chamber alternant polarization-FID controlled
Journey schematic diagram；
Fig. 3 is the structural representation of double air chamber nuclear spin gyroscopes described in the utility model embodiment 2.
Embodiment
With reference to embodiment and accompanying drawing, the utility model is described in further detail：
Embodiment 1：
As shown in figure 1, a kind of double air chamber nuclear spin gyroscopes, including the first magnetic screen shell 7, the first air chamber 1, the first pump
Pu coil 5, the first main field coil 3, first laser detector 9, the second magnetic screen shell 8, the second air chamber 2, the second pumping line
The 6, second main field coil 4, second laser detector 10, pump laser 11, magnetic field generator 14 and signal processor 15 are enclosed,
First air chamber 1, the first pumping coil 5 and the first main field coil 3 are placed in the first magnetic screen shell 7, the second air chamber 2,
Two pumping coils 6 and the second main field coil 4 are placed in the second magnetic screen shell 8, first laser detector 9, second laser
Detector 10, pump laser 11, magnetic field generator 14 and signal processor 15 are placed in the first magnetic screen shell 7 and the second magnetic
Shield outside shell 8；Magnetic direction caused by magnetic field caused by first pumping coil 5 and the first main field coil 3 be mutually perpendicular to and
The first air chamber 1 can be passed through, magnetic direction caused by magnetic field caused by the second pumping coil 6 and the second main field coil 4 is mutual
Vertically and it can pass through the second air chamber 2；Magnetic field caused by first pumping coil 5 and magnetic direction caused by the second pumping coil 6
Identical, magnetic field is identical with magnetic direction caused by the second main field coil 4 caused by the first main field coil 3, and shape, size are equal
In identical the first air chamber 1 and the second air chamber 2 comprising alkali metal atom, the intert-gas atoms for spin-exchange polarization and
Buffer gas, the control output end of magnetic field generator 14 input with the first pumping coil 5, the first main field coil 3 respectively
Input, the second pumping coil 6 input and the second main field coil 4 input it is corresponding connect, pump laser 11
Half laser in caused laser after the half reflection reflection of pump power mirror 13 with half reflection and half transmission function reflects is along the
Magnetic direction caused by two pumping coils 6 passes through the second air chamber 2, is then radiated at the induction end of second laser detector 10, pump
Second half laser in laser caused by Pu laser 11 after the transmission of half reflection reflection of pump power mirror 13, which passes through, has total reflection work(
After the reflection of total reflection reflection of pump power mirror 12 of energy the first air chamber 1, Ran Houzhao is passed through along magnetic direction caused by the first pumping coil 4
Penetrate the induction end in first laser detector 9, the signal output part of first laser detector 9 and the letter of second laser detector 10
Number input of the output end respectively with signal processor 15 is connected；First laser detector 9 and second laser detector 10 are
Photodetector；Half reflection reflection of pump power mirror 13 is a kind of spectroscope.Explanation：The order that above-mentioned pumping laser is divided into two also may be used
With on the contrary, can first along magnetic direction caused by the first pumping coil 5 pass through the first air chamber 1 after be radiated at first laser detection
The induction end of device 9, irradiated after then second half laser is again along magnetic direction caused by the second pumping coil 6 through the second air chamber 2
In the induction end of second laser detector 10, such case and the outside for being located proximate to the first air chamber 1 of pump laser 11
Structure is corresponding.
In said structure, if the three-dimensional coordinate formed with x-axis, y-axis, z-axis represents direction, the He of the first pumping coil 5
Magnetic direction caused by second pumping coil 6 is x-axis direction, magnetic caused by the first main field coil 3 and the second main field coil 4
Field direction is z-axis direction.
In said structure, preferred structure is：First air chamber 1 and the heat-resisting glass that the second air chamber 2 is the length of side about 2~10mm
Cube made of glass or the suitable glass envelope of size；Contain number mbar's in two air chambers129Xe, number mg metal87Rb steams
Vapour, simultaneously the buffer N containing tens mbar2；In order to improve gyro resolution ratio, reduce the interference of external magnetic field, Xe in air chamber
Atom can use two kinds of isotope atoms, such as129Xe and131Xe；After air chamber structure part machines, clean processing must be carried out,
Then, plated film (such as rubidium hydride or Parylene) processing is carried out to air chamber inner surface as needed；First magnetic screen shell 7 and second
The material of magnetic screen shell 8 uses sandwich construction, and innermost layer uses high permeability materials (mu-metal), to provide high magnetic screen
Coefficient, outer layer use low permeability magnetic material, to make it have higher diamagnetic saturation intensity.
In order to make it easy to understand, the preferred control method that double air chamber nuclear spin gyroscopes above-mentioned to the utility model use below
It is illustrated, but following methods are not unique methods, nor protection object of the present utility model.
As depicted in figs. 1 and 2, the preferred control method that double air chamber nuclear spin gyroscopes described in the present embodiment use, including
Following steps：
(1) control the first pumping coil 5 to produce magnetic field by magnetic field generator 14, open pump laser 11, the first air chamber 1
Intert-gas atoms be polarized under corresponding pump light by the spin exohange collision with alkali metal atom, break after the completion of polarization
Open the power supply of the first pumping coil 5；
(2) the first main field coil 3 is controlled to produce magnetic field, the indifferent gas to be polarized in the first air chamber 1 by magnetic field generator 14
Body atom surrounds corresponding main field and does Larmor precession；
(3) first laser detector 9 detects the FID signal through the first air chamber 1 and is transferred to signal processor 15 and calculates
Angular displacement；
(4) the second pumping coil 6 is controlled to produce magnetic field by magnetic field generator 14, the intert-gas atoms of the second air chamber 2 exist
It is polarized under corresponding pump light by the spin exohange collision with alkali metal atom, the second pumping coil 6 is disconnected after the completion of polarization
Power supply；
(5) the second main field coil 4 is controlled to produce magnetic field, the indifferent gas to be polarized in the second air chamber 2 by magnetic field generator 14
Body atom surrounds corresponding main field and does Larmor precession；
(6) second laser detector 10 detects the FID signal through the second air chamber 2 and is transferred to signal processor 15 and calculates
Angular displacement；
(7) repeat step (1)-step (6), the phase offset that signal processor 15 is resolved using two-way FID signal are spelled
Connect to obtain continuous angular displacement signal, specifically, when gyroscope rotates around z-axis, gyro angle position can be introduced in this phase angle
Shifting signal, by compared with reference clock signal, obtaining continuous angular displacement signal.
Embodiment 2：
The present embodiment is the deformation carried out on the basis of embodiment 1, and its difference is：
As shown in figure 3, the laser is two and respectively pump laser 11 and detecting laser 20, pumping laser
Half laser in laser caused by device 11 after the half reflection reflection of pump power mirror 13 with half reflection and half transmission function reflects
2 second air chambers are passed through along magnetic direction caused by the second pumping coil 6, pass through half reflection in laser caused by pump laser 11
Reflection of pump power mirror 13 transmit after second half laser pass through the reflection of total reflection reflection of pump power mirror 12 with total reflection function after along the
Magnetic direction caused by one pumping coil 5 passes through the first air chamber 1；By having half reflection in laser caused by detecting laser 20
Half transmitting function half reflection detection speculum 19 reflect after half laser along simultaneously with the second main field coil 4 caused by magnetic
The vertical direction JizZhou directions of magnetic direction caused by field direction and the second pumping coil 6 pass through the second air chamber 2, exploring laser light
Second half laser in laser caused by device 20 after half reflection detection speculum 19 transmits is passed through with the complete of total reflection function
Reflection detection speculum 18 reflect after along simultaneously with the first main field coil 3 caused by magnetic direction and the first pumping coil 5 produce
The vertical direction JizZhou directions of raw magnetic direction pass through the first air chamber 1；Two parts of laser caused by detecting laser 20 point
The induction end and the second differential type of the first differential type polarization detector 16 Chuan Guo not be radiated at after the first air chamber 1 and the second air chamber 2
The induction end of polarization detector 17, the signal output part of the first differential type polarization detector 16 and the second differential type polarization detector
Input of 17 signal output part respectively with signal processor 15 is connected.
Comparison diagram 3 and Fig. 1 understands that the architectural difference of the present embodiment compared with Example 1 is：The present embodiment is in embodiment
Detecting laser 20, half reflection detection speculum 19 and total reflection detection speculum 18 are added on the basis of 1, and it is poor with first
The differential type polarization detector 17 of fraction polarization detector 16 and second instead of the first laser detector 9 and second of embodiment 1
The two photodetectors of laser detector 10.
Correspondingly, the preferred control method of the present embodiment is also corresponded to and changed, and the control method of the present embodiment is：
(1) control the first pumping coil 5 to produce magnetic field by magnetic field generator 14, open pump laser 11 and exploring laser light
Device 20, the intert-gas atoms of the first air chamber 1 pass through the spin-exchange with alkali metal atom under corresponding pump light and detection light
Collision is polarized, and the power supply of the first pumping coil 5 is disconnected after the completion of polarization；
(2) the first main field coil 3 is controlled to produce magnetic field, the indifferent gas to be polarized in the first air chamber 1 by magnetic field generator 14
Body atom surrounds corresponding main field and does Larmor precession；
(3) first differential type polarization detectors 16 detection detection light passes through the FID signal formed after the first air chamber 1 and transmission
Polarization is calculated to the anglec of rotation to signal processor 15；
(4) the second pumping coil 6 is controlled to produce magnetic field by magnetic field generator 14, the intert-gas atoms of the second air chamber 2 exist
It is polarized under corresponding pump light and detection light by the spin exohange collision with alkali metal atom, the second pump is disconnected after the completion of polarization
The power supply of Pu coil 6；
(5) the second main field coil 4 is controlled to produce magnetic field, the indifferent gas to be polarized in the second air chamber 2 by magnetic field generator 14
Body atom surrounds corresponding main field and does Larmor precession；
(6) second differential type polarization detectors 17 detection detection light passes through the FID signal formed after the second air chamber 2 and transmission
Polarization is calculated to the anglec of rotation to signal processor 15；
(7) repeat step (1)-step (6), signal processor 15 is using the polarization that two-way FID signal resolves to rotation
Angle, which is spliced, continuously to be polarized to rotary angle signal.
Above-described embodiment is preferred embodiment of the present utility model, is not the limit to technical solutions of the utility model
System, as long as the technical scheme that can be realized without creative work on the basis of above-described embodiment, is regarded as falling into
In the rights protection scope of the utility model patent.
Claims (4)
- A kind of 1. double air chamber nuclear spin gyroscopes, it is characterised in that：Including the first magnetic screen shell, the first air chamber, the first pumping Coil, the first main field coil, first laser detector, the second magnetic screen shell, the second air chamber, the second pumping coil, second Main field coil, second laser detector, laser, magnetic field generator and signal processor, first air chamber, described first Pumping coil and first main field coil are placed in the first magnetic screen shell, caused by the first pumping coil Magnetic direction caused by magnetic field and first main field coil is mutually perpendicular to and can pass through first air chamber, and described second Air chamber, the second pumping coil and second main field coil are placed in the second magnetic screen shell, and described second Magnetic direction caused by magnetic field caused by pumping coil and second main field coil is mutually perpendicular to and can be through described the Two air chambers；Magnetic field is identical with magnetic direction caused by the second pumping coil caused by the first pumping coil, and described Magnetic field caused by one main field coil is identical with magnetic direction caused by second main field coil, shape, size all same First air chamber and second air chamber in comprising alkali metal atom, the intert-gas atoms for spin-exchange polarization And buffer gas, the control output end of the magnetic field generator input with the first pumping coil, described first respectively The input of the input of main field coil, the input of the second pumping coil and second main field coil correspondingly connects Connect, laser caused by the laser is divided into two be each passed through first air chamber and second air chamber after be radiated at respectively The induction end of the induction end of the first laser detector and the second laser detector, the letter of the first laser detector Input of the signal output part of number output end and the second laser detector respectively with the signal processor is connected.
- 2. double air chamber nuclear spin gyroscopes according to claim 1, it is characterised in that：The first laser detector, institute State second laser detector, the laser, the magnetic field generator and the signal processor and be placed in first magnetic cup Cover outside shell and the second magnetic screen shell.
- 3. double air chamber nuclear spin gyroscopes according to claim 1 or 2, it is characterised in that：The laser be one and It is anti-to pass through the half reflection pumping with half reflection and half transmission function for pump laser, in laser caused by the pump laser Magnetic direction is through first air chamber or along described caused by the half laser along the first pumping coil penetrated after mirror reflection Magnetic direction caused by second pumping coil passes through second air chamber, passes through in laser caused by the pump laser described Second half laser after the transmission of half reflection reflection of pump power mirror is through with edge after being totally reflected the total reflection reflection of pump power mirror reflection of function Magnetic direction caused by the second pumping coil is through second air chamber or along magnetic field caused by the first pumping coil Direction passes through first air chamber, and the first laser detector and the second laser detector are photodetector.
- 4. double air chamber nuclear spin gyroscopes according to claim 1 or 2, it is characterised in that：The laser be two and Respectively pump laser and detecting laser, by having half reflection and half transmission work(in laser caused by the pump laser Magnetic direction is described in caused by half laser along the first pumping coil after the half reflection reflection of pump power mirror reflection of energy First air chamber passes through second air chamber along magnetic direction caused by the second pumping coil, and the pump laser produces Laser in by the half reflection reflection of pump power mirror transmission after second half laser pass through with total reflection function total reflection pump Along magnetic direction caused by the second pumping coil through second air chamber or along first pump after the reflection of Pu speculum Magnetic direction caused by the coil of Pu passes through first air chamber；By having half reflection in laser caused by the detecting laser Half laser after the half reflection detection speculum reflection of half transmitting function is along while with caused by first main field coil The vertical direction of magnetic direction caused by magnetic direction and the first pumping coil through first air chamber or along simultaneously with Wear in the vertical direction of magnetic direction caused by magnetic direction caused by second main field coil and the second pumping coil Second air chamber is crossed, is detected in laser caused by the detecting laser by the half reflection another after speculum transmits Half laser produces on edge with second main field coil simultaneously after the total reflection detection speculum reflection with total reflection function Magnetic direction and the second pumping coil caused by the vertical direction of magnetic direction through second air chamber or simultaneously with Wear in the vertical direction of magnetic direction caused by magnetic direction caused by first main field coil and the first pumping coil Cross first air chamber；Two parts of laser caused by the detecting laser are each passed through first air chamber and described second The induction end of the first laser detector and the induction end of the second laser detector are radiated at after air chamber, described first swashs Photo-detector and the second laser detector are differential type polarization detector.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720655084.1U CN206756173U (en) | 2017-06-07 | 2017-06-07 | A kind of double air chamber nuclear spin gyroscopes |
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| CN201720655084.1U CN206756173U (en) | 2017-06-07 | 2017-06-07 | A kind of double air chamber nuclear spin gyroscopes |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063226A (en) * | 2017-06-07 | 2017-08-18 | 中国工程物理研究院总体工程研究所 | A kind of pair of air chamber nuclear spin gyroscope and its control method |
| WO2020119642A1 (en) * | 2018-12-10 | 2020-06-18 | 中科知影(北京)科技有限公司 | Multi-channel atomic magnetic detector |
-
2017
- 2017-06-07 CN CN201720655084.1U patent/CN206756173U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107063226A (en) * | 2017-06-07 | 2017-08-18 | 中国工程物理研究院总体工程研究所 | A kind of pair of air chamber nuclear spin gyroscope and its control method |
| CN107063226B (en) * | 2017-06-07 | 2023-05-02 | 中国工程物理研究院总体工程研究所 | Double-air-chamber nuclear spin gyroscope and control method thereof |
| WO2020119642A1 (en) * | 2018-12-10 | 2020-06-18 | 中科知影(北京)科技有限公司 | Multi-channel atomic magnetic detector |
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